“Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, share links and videos, and learn more about the people they meet.”

This what i’ve found in their about page. Honestly, i really don’t know Facebook.com website before until see it in the technorati top searches. For me it’s only another type of social networking site.